PC World - Hey Facebook fans, rumor has it you may be getting e-mail addresses ending with "@facebook.com" as early as Monday. It's a thought that likely has privacy advocates cringing as even more user data would fall under the control of the world's largest social network. The rumored service wouldn't be just an updated version of Facebook's currently pathetic Inbox, either, but an actual Webmail client to compete with services such as Gmail and Hotmail, according to TechCrunch . Code-named Project Titan, the new e-mail service is expected to be announced Monday at a special Facebook press event during the Web 2.0 Summit in San Francisco. Rumors of a Facebook e-mail service first surfaced in February. At the time, it was suggested that your Facebook vanity URL might be automatically assigned to you as your @facebook.com e-mail address. Facebook invitation hints Adding credence to TechCrunch's report are two features in Facebook's pres...